Château Carbonneau stands elegantly at the centre of its 57-hectare estate in Pessac-sur-Dordogne, south-western France, where it has been under the control of the same family for more than half of its 150 year history.

A transitional arrangement that enables the UK to remain within the single market and customs union is “a necessary first step” to promote confidence in the wine and spirits sector, according to the Wine and Spirit Trade Association (WSTA) chief executive...